Wróbel, Piotr. “Bosnia’s Attitude to the Expansion of Islam in the First Half of the 15th Century”. Balcanica Posnaniensia. Acta et studia 8 (August 2, 1997): 83–92. Accessed August 8, 2026. https://pressto.amu.edu.pl/index.php/bp/article/view/54687.